Part one of term paper
A bulletproof vest is a protective covering worn to protect the torso against bullets. Body armor fell into disguise in the sixteenth and seventeenth centuries, partly because it was ineffective against bullets. Modern body armor reappeared during World War I as a means of protecting the torso from shell fragments, but the armor was too heav ...

Part two of term paper
... by the wearer while affording him adequate protection against fragments from artillery shells, mortar shells, and anti-aircraft shells. They could not stop armor piercing bullets however. In the 1960's new types of vests were developed whose plates were made of composite layers of steel or a very hard ceramic, boron carbide. However, the discovery that numerous layers of nylon fabric could dissipate the energy of the bullet revolutionized the use of modern body armor. The function ...